Memorandum - 35 U.S.C. 112, Second and Sixth Paragraphs Robert Clarke Director, Office of Patent Legal Administration United States Patent and Trademark Office

2/09/ USC 112, Second and Sixth Paragraphs  Memorandum signed by John Love, Deputy Commissioner for Patent Examination Policy (DCPEP) on September 2, 2008: –“Rejection under 35 U.S.C. 112, second paragraph, when examining means (or step) plus function claim limitations under 35 U.S.C. 112, sixth paragraph”

2/09/ USC 112, Second and Sixth Paragraphs  A rejection under 35 USC 112, 2 nd may be appropriate in the following situation when examining means (or step) plus function limitations under 35 USC 112, 6 th :  When it is unclear whether a claim limitation invokes 35 USC 112, 6 th ;  When there is no disclosure (or insufficient disclosure) of structure, material, or acts for performing the claimed function; and/or  When applicant fails to clearly link or associate the disclosed structure, material, or acts to the claimed function.

2/09/ USC 112, Second and Sixth Paragraphs I.When it is unclear whether a limitation invokes 112, 6 th  A claim limitation is presumed to invoke 35 USC 112, 6 th, if it meets the 3-prong analysis set forth in MPEP 2181:  The claim limitation must use the phrase “means for” or “step for”;  The phrase recited in the claim must be modified by functional language; and  The phrase recited in the claim must not be modified by sufficient structure, material, or acts for achieving the specified function.

2/09/ USC 112, Second and Sixth Paragraphs I. When it is unclear whether a limitation invokes 112, 6 th (cont’d)  A claim limitation does not invoke 35 USC 112, 6 th, –If the phrase “means for” or “step for” is modified by sufficient structure, material, or acts recited in the claim for performing the claimed function.  A rejection under 35 USC 112, 2 nd, is appropriate if it is unclear to one of ordinary skill in the art whether the recited structure, material, or acts in the claim are sufficient for performing the claimed function.

2/09/ USC 112, Second and Sixth Paragraphs II. Insufficient disclosure of structure, material, or acts for performing the claimed function (cont’d)  A rejection under 35 USC 112, 2 nd, is appropriate if there is no disclosure (or insufficient disclosure) of structure, material, or acts for performing the claimed function.  A bare statement that known techniques or methods can be used would not be a sufficient disclosure. –See Biomedino, LLC v. Waters Technology Corp.

2/09/ USC 112, Second and Sixth Paragraphs II. Insufficient disclosure of structure, material, or acts for performing the claimed function (cont’d)  For a computer-implemented means-plus-function claim limitation that invokes 35 USC 112, 6 th, the corresponding structure is required to be more than simply a general purpose computer or microprocessor. –See Aristocrat Technologies, Inc. v. International Game Technology.  The corresponding structure for a computer-implemented function must include the algorithm as well as the general purpose computer or microprocessor. –See WMS Gaming, Inc. v. International Game Technology

2/09/ USC 112, Second and Sixth Paragraphs II. Insufficient disclosure of structure, material, or acts for performing the claimed function (cont’d)  The written description must at least disclose the algorithm that transforms the general purpose microprocessor to a special purpose computer programmed to perform the disclosed algorithm that performs the claimed function. –See Aristocrat.  Applicant may express the algorithm in any understandable terms including as a mathematical formula, in prose, in a flow chart, or in any other manner that provides sufficient structure. – See Finisar Corp. v. The DIRECTV Group Inc.

2/09/ USC 112, Second and Sixth Paragraphs II. Insufficient disclosure of structure, material, or acts for performing the claimed function (cont’d)  A rejection under 35 U.S.C. 112, second paragraph, is appropriate if the written description of the specification discloses no corresponding algorithm, such as: –Merely referencing to a general purpose computer with appropriate programming without providing any detailed explanation of the appropriate programming, or –Simply reciting software without providing some detail about the means to accomplish the function.

2/09/ USC 112, Second and Sixth Paragraphs II. Insufficient disclosure of structure, material, or acts for performing the claimed function (cont’d) –An argument that one of ordinary skill in the art is capable of writing the software to convert a general purpose computer to a special purpose computer to perform the claimed function is insufficient to overcome a rejection under 35 USC 112, 2 nd, for the lack of sufficient disclosure of the corresponding structure.

2/09/ USC 112, Second and Sixth Paragraphs II. Insufficient disclosure of structure, material, or acts for performing the claimed function (cont’d)  If there is no disclosure (or insufficient disclosure) of the structure for performing the claimed function, the examiner should carefully determine whether the disclosure requirements of 35 USC 112, 1 st, are met.  To satisfy the written description requirement, the specification must describe the claimed invention in sufficient detail that one of ordinary skill in the art can reasonably conclude that the inventor had possession of the claimed invention.

2/09/ USC 112, Second and Sixth Paragraphs II. Insufficient disclosure of structure, material, or acts for performing the claimed function (cont’d)  Therefore, when reviewing a computer-implemented means-plus-function claim limitation, if the written description fails to disclose any program or algorithm and more than routine experimentation would be required of one skilled in the art to generate such a program, the examiner would also have a reasonable basis for making an enablement rejection under 35 USC 112, 1 st. See also MPEP (c).

2/09/ USC 112, Second and Sixth Paragraphs III. Applicant fails to clearly link or associate the disclosed structure, material, or acts to the claimed function  The requirement that a particular structure be clearly linked with the claimed function in order to qualify as corresponding structure is the quid pro quo for the convenience of employing 35 USC 112, 6 th.  A rejection under 35 USC 112, 2 nd, is appropriate if one of ordinary skill in the art cannot identify what structure, material, or acts disclosed in the written description perform the claimed function.

2/09/0914 Contact Information Robert Clarke (571)

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